The original scans were low resolution. You cannot upscale without quality loss. Look for “HD” or “300 DPI” CBZ releases. Alternatively, use a reader with sharpening filters (e.g., Perfect Viewer with Lanczos resampling).
Each image in the ZIP file represents one page of the comic. cbz comics
Most modern comic readers handle both equally well. The original scans were low resolution
Q: What is CBZ Comics? A: CBZ Comics is a digital comic book platform that allows users to read, create, and share comic books in a digital format. cbz comics